Nonvolatile Plc Markers And Words - HEIDENHAIN iTNC 530 Service Manual

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10.5 Nonvolatile PLC Markers and Words

Certain PLC markers and words are not deleted when the machine is switched off but remain

battery-buffered in the RAM of the control.

The remanent PLC memory area is displayed on the PLC main menu.

This remanent PLC memory area can also stored on a file of the hard disk and loaded again for

test purposes.

Enter the PLC code number --> see "Code Numbers" on page 3 – 13

Shift the soft-key row

Call the TABLE function

Shift the soft-key row

The defined maximum range of the nonvolatile PLC markers and words

(e.g. M0... M999, B0 ... B127) is automatically entered by iTNC.

This range can be changed by the operator.

Note: Here the unit B (bytes) instead of W (words) is not an error.

--> A byte is the smallest subset of a word.

Confirm setting

The default setting offered by the iTNC is PLC:\PLCMEM.A. If required, more

than one file can be stored on the hard disk.

The states or contents of the PLC markers / words are stored on the hard disk

in the indicated file.

Exit PLC operating mode.